Door locking device



June 18, 1957 L. PERAS DOOR LOCKING DEVICE 2 Sheets-Sheet 1 Filed Feb.2, 1954 l/lll MVr/W0@ UQlE/V PER/35 BM@ June 18, 1957 L. PERAS DOORLOOKING DEVICE 2 Sheets-Sheet 2 Filed Feb. 2, 1954 ATTORNE Y UnitedStates Patent 2,795,947 DOOR LOCKING DEVICE Lucien Peras, Billancourt,France, assignor to Regie Nationale des Usines Renault, Billancourt,France Application February 2, 1954, Serial No. 407,625 Claims priority,application France February 13, 1953 1 Claim. (Cl. 711-141) Theinvention relates in general to a lock, which is particularly suitablefor the locking of doors, luggage compartments or hoods of motor cars.The locking device forming the subject of the invention permits theopening and the closing, with automatic locking, of the door or of thecompartment closure or hood, simply by pressing the member to be locked,there being no need to actuate a handle.

On the accompanying drawing:

Figure 1 shows a view, in cross section along the symmetrical plane ofthe car, of the lock mounted on the movable door of the rear luggagecompartment;

Figure 2 is a view in the direction of the arrow Il (Figure l) of thesame lock, with the latch bolt and its pin removed;

Figure 3 is a View in the direction of the arrow Ill in Figure 1 (latchbolt in locked position, full line, and in unlocked position,dot-and-dash line).

Referring to Figure 1, it will be seen that 1 represents the oor of thecar, 2 the sheet-metal closure or door of the rear compartment, and 3 astirrup bolted to the oor of the car. The reinforcing plate 5, forsecuring the lock, is welded to the interior lining 4, of the door 2.This reinforcing plate has an aperture 6 (see Figure 1). Alatch-supporting plate 7 is secured by four bolts to the reinforcingplate 5, which has a special cut-away portion at the bottom, with twoextensions 7l and 72 (Fig. 2), between which the stirrup 3 fits and iscentered in the closed position (see Figure 3). Thelatch-bolt-supporting plate 7 has a circular aperture 8, into which cant a pin 9, actuated by the cylinder lock which will be describedhereafter. A latch bolt 10, intended to engage with the stirrup 3, iscut out in the shape illustrated in Figures 1 and 3, and is articulatedabout the pin 11 secured in the plate 7. The axis of this pin isperpendicular to the hinge-line of the door. On this pin, there aremounted a friction washer 12, a spacer ring 13, a self-locking nut 14,and a hairpin spring 15 which, as shown in Figure 3, rests against astud 19 riveted into the latch-bolt-supporting plate 7 and against thelatch bolt 10 in such a manner as to tend to turn the latter- (seeFigure 3) in a clockwise direction, i. e. in the opening direction. Thespring 15 is wound with two turns around the pin 11, thus permittingrotation, with uniform friction, of the latch bolt 10 about the pin 11.At its upper end, the latch bolt 10 has two notches 16 and 17, limitedby a shoulder 17h. The diameter of the aperture 8 and the height of theshoulder 17D are such that the pin 9 interlocks at the top of theaperture 8, preventing the shoulder 17b from escaping to the right(Figure 3). As shown on Figure 3, the pin 9 can rest, according to thecircumstances, in the notch 16 or in the notch 17 of the latch bolt 10,which are connected by a cam surface as shown in the drawing.

The cylinder lock 20, of a known type, is secured in the door 2 by meansof a clip 21, a sealing washer 2lb, and a resilient washer 18. Thecylinder lock 20 has a flat portion at the point where it traverses thecase of the door 2 so as to hold it against rotation. The plug -of thecylinder lock has at its end in the door 2 an eccentric cylinder 22having a bearing in the latch-bolt-carrying plate 7 by means of a stud23.

The pin 9 is carried by a lever 24 articulated about a pin on the plate7. A spring 26 is wound several times rice round the body of thecylinder lock 20 and is hooked to the cylinder lock 20 and rests againstthe pin 9, constantly maintaining contact between the lever and theeccentric cylinder 22. The cylinder lock is actuated by means of a keywhich permits the cylinder 22 to be turned and the lever 24 to beraised. A clip 26b maintains the longitudinal spacing of the cylinder 22from the cylinder lock 20 and the spring 26.

The lock operates as follows:

Figure 3 represents the lock in closed position. In order to open thelock, the key is inserted in the cylinder lock 20 and turned, which hasthe effect, by means of the eccentric cylinder 22, of causing rotationof the lever 24 about the pin 25. The pin 9 carried by the lever 24 israised and thus releases the latch bolt 10 which, urged by the spring15, moves into the position indicated in dot-and-dash lines in Figure 3.The shoulder 17b then abuts against the pin 9. The stirrup 3 is thenreleased by the latch bolt 10 and the door 2 of the compartment can beraised. If the key is released or withdrawn, the spring 26 restores thelever 24 to its lower position and the pin 9 enters the notch 17 in thelatch bolt 10, leaving it in the open position ready to receive thestirrup 3. If the door is now closed again, the stirrup 3 strikesagainst the bottom of the latch bolt, restoring the latch bolt 10 to theposition illustrated in full lines in Figure 3. The pin 9, biased by thespring 26, passes from the position 17 to the position 16 as a result ofthe cam surface at this point on the latch bolt 10. The door is thusclosed and automatically locked Without the need of any furtheroperation.

This lock is characterized by a great simplicity of design. It isparticularly suitable for the doors of luggage compartments or for thehoods of motor cars. The key used for opening it may conveniently be thesame as the ignition key for the car or the key to the other doorsgiving access to the compartments reserved for passengers, luggage orgoods.

I claim:

In a motor vehicle having a body and a member hinged thereto, a lockingdevice for locking said member to said body, said device comprising, incombination, a supporting plate secured in predetermined position to thehinged member, a latch bolt articulated on said supporting plate aboutan axis perpendicular to the axis of the hinges of the member, a stirrupsecured to the body of the vehicle for engagement with the latch boltwhen the hinged member is closed, a key-actuated cylinder lock mountedin said member and having an eccentric cylinder member, a lever platearticulated on the supporting plate, a spring-urged pin carried by saidlever plate and positioned to engage the latch bolt, said lever platebeing positioned to be articulated by said eccentric cylinder memberupon rotation thereof upon introduction and turning of a key in thecylinder lock, said latch bolt having an edge provided with twospaced-apart notches connected by a cam surface and said pin beingpositioned to engage with said notches and said cam surface, springmeans normally urging said latch bolt toward said pin, and said latchbolt being provided with a recess for locking engagement with saidstirrup upon closing of said member.

References Cited in the tile of this patent UNITED STATES PATENTS1,937,520 Lightner Dec. 5, 1933 2,603,963 Allen July 22, 1952 2,608,428Allen Aug. 26, 1952 2,658,778 Dall Nov. l0, 1953 2,680,639 Vigmostadlune 8, 1954 FOREIGN PATENTS 630,768 Great Britain Oct. 20, 1949

